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Deformation Mechanisms Of Twinned Nanoparticles And Nanowires, Erik Bitzek, Wolfram Nohring, Andreas Kelling, Cynthia Volkert

Nanomechanical Testing in Materials Research and Development V

The plastic deformation of nanoscale metallic specimens has recently attracted a lot of interest due to the reported changes of deformation mechanisms with reduced size. Similarly, the interaction of dislocations with twin boundaries has received lots of attention in the context of the ultrahigh strength and ductility of nanotwinned metals. Here, we present experiments and atomistic simulations of compression test on twinned gold nanoparticles to study dislocation processes and -storage in nanosized volumes and dislocation-twin interaction mechanisms and compare them with the deformation behavior of twinned silver and gold nanowires.

Compression experiments were performed on triangular shaped, facetted particles using …